1) Brick 2) Brick made of fire clay 
refractory material consisting of nonmetallic minerals formed in a variety of shapes for use at high temperatures, particularly in structures for ... [2 related articles]
[n] - brick made of fire clay
noun brick made of fire clay; used for lining e.g. furnaces and chimneys
a brick made from a highly fire-resistant clay found at a great depth in the ground.
a brick made of fire clay.